Advertise other people's products.

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If you already have a Web site or a blog, look for vendors that offer related but non-competing products and see if they have an affiliate program. Stick to familiar products and brands - they're easier to sell. To promote those products:Place simple text or graphical ads in appropriate places on your siteInclude links to purchase products you review or recommend in a blog, discussion forum or mailing list you controlCreate a dedicated sales page or Web site to promote a particular productThey all work - it just depends on how much time you have to spend on it and your level of expertise with Web design and marketing.The above list is by no means comprehensive, but it highlights some of the new and interesting ways to make money online without investing any money, without having a product of your own, and without having expert sales and marketing skills. Most of all, unlike taking surveys or getting paid to read e-mail, the potential return on your time investment is substantial.